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| author | Yu Zhao <yuzhao@google.com> | 2024-09-06 06:21:08 +0200 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-09-10 01:39:18 +0200 |
| commit | e0a955bf7f61cb034d228736d81c1ab3a47a3dca (patch) | |
| tree | 7e5645a5d878247257de304c46b7965d04a9d8fa /mm/migrate.c | |
| parent | mm/codetag: fix pgalloc_tag_split() (diff) | |
| download | linux-e0a955bf7f61cb034d228736d81c1ab3a47a3dca.tar.xz linux-e0a955bf7f61cb034d228736d81c1ab3a47a3dca.zip | |
mm/codetag: add pgalloc_tag_copy()
Add pgalloc_tag_copy() to transfer the codetag from the old folio to the
new one during migration. This makes original allocation sites persist
cross migration rather than lump into the get_new_folio callbacks passed
into migrate_pages(), e.g., compaction_alloc():
# echo 1 >/proc/sys/vm/compact_memory
# grep compaction_alloc /proc/allocinfo
Before this patch:
132968448 32463 mm/compaction.c:1880 func:compaction_alloc
After this patch:
0 0 mm/compaction.c:1880 func:compaction_alloc
Link: https://lkml.kernel.org/r/20240906042108.1150526-3-yuzhao@google.com
Fixes: dcfe378c81f7 ("lib: introduce support for page allocation tagging")
Signed-off-by: Yu Zhao <yuzhao@google.com>
Acked-by: Suren Baghdasaryan <surenb@google.com>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to '')
| -rw-r--r-- | mm/migrate.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/mm/migrate.c b/mm/migrate.c index 0f6b78fd73aa..dfdb3a136bf8 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -743,6 +743,7 @@ void folio_migrate_flags(struct folio *newfolio, struct folio *folio) folio_set_readahead(newfolio); folio_copy_owner(newfolio, folio); + pgalloc_tag_copy(newfolio, folio); mem_cgroup_migrate(folio, newfolio); } |